Load the collection in the controller

[jcoyne]

Interfacing with external services like solr ought to be done in the controller rather than in the view

[marlo-longley]

Does this PR have implications for how other components are loading page_location ? They should continue to load as a helper as in:

SearchWorks/app/components/searchworks4/digital_collections_facet_header_component.rb

Line 5 in b834d0f

delegate :page_location, :search_state, :add_filter_unless_present, :remove_filter_if_present, to: :helpers

SearchWorks/app/components/searchworks4/search_result/collection_info_component.rb

Line 14 in b834d0f

helpers.page_location.collection? && collection.present?

[jcoyne]

@marlo-longley no, I don't think anything is changed about it. Its still in the helper context.